GB526901A - Improvements in and relating to electro-mechanical apparatus - Google Patents

Improvements in and relating to electro-mechanical apparatus

Info

Publication number
GB526901A
GB526901A GB967139A GB967139A GB526901A GB 526901 A GB526901 A GB 526901A GB 967139 A GB967139 A GB 967139A GB 967139 A GB967139 A GB 967139A GB 526901 A GB526901 A GB 526901A
Authority
GB
United Kingdom
Prior art keywords
portions
ribbon
bolts
pieces
pole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB967139A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RESLO SOUND EQUIPMENT Ltd
Original Assignee
RESLO SOUND EQUIPMENT Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RESLO SOUND EQUIPMENT Ltd filed Critical RESLO SOUND EQUIPMENT Ltd
Priority to GB967139A priority Critical patent/GB526901A/en
Publication of GB526901A publication Critical patent/GB526901A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/08—Microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Abstract

526,901. Permanent magnets. RESLO (SOUND EQUIPMENT), Ltd., and MURKHAM. L. W. March 28, 1939. No. 9671. [Class 35] [Also in Group XXXIX] A permanent magnet, especially intended for ribbon microphones, comprises two parallel barlike portions 10a which are adapted to receive pole-pieces 12 defining a linear gap between them, and one or more transverse bridging portions 10b lying behind the bar-like portions. As shown, two spaced bridging portions 10b are provided. The pole-pieces 12 are secured by bolts 11, which may have a small clearance to enable the width of the air gap to be adjusted. The polepieces may also be located by studs on the magnet. The bolts 11 also secure a frame 13 which carries the ribbon 17 with clamping strips 16 and terminal tags 19. The ribbon 17 is formed with three semi-circular depressions 17a.
GB967139A 1939-03-28 1939-03-28 Improvements in and relating to electro-mechanical apparatus Expired GB526901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB967139A GB526901A (en) 1939-03-28 1939-03-28 Improvements in and relating to electro-mechanical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB967139A GB526901A (en) 1939-03-28 1939-03-28 Improvements in and relating to electro-mechanical apparatus

Publications (1)

Publication Number Publication Date
GB526901A true GB526901A (en) 1940-09-27

Family

ID=9876499

Family Applications (1)

Application Number Title Priority Date Filing Date
GB967139A Expired GB526901A (en) 1939-03-28 1939-03-28 Improvements in and relating to electro-mechanical apparatus

Country Status (1)

Country Link
GB (1) GB526901A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484037A (en) * 1981-05-26 1984-11-20 U.S. Philips Corporation Ribbon-type electro-acoustic transducer with low distortion and improved sensitivity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4484037A (en) * 1981-05-26 1984-11-20 U.S. Philips Corporation Ribbon-type electro-acoustic transducer with low distortion and improved sensitivity

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